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Patch "vhost_net: stop device during reset owner" has been added to the 4.4-stable tree

PATCH [email protected] 1 participant 1 message Feb 7, 2018

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This is a note to let you know that I've just added the patch titled

vhost_net: stop device during reset owner

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
vhost_net-stop-device-during-reset-owner.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From foo@baz Wed Feb 7 11:22:35 PST 2018

From: Jason Wang <[email protected]>
Date: Thu, 25 Jan 2018 22:03:52 +0800
Subject: vhost_net: stop device during reset owner

From: Jason Wang <[email protected]>

[ Upstream commit 4cd879515d686849eec5f718aeac62a70b067d82 ]

We don't stop device before reset owner, this means we could try to serve any virtqueue kick before reset dev->worker. This will result a warn since the work was pending at llist during owner resetting. Fix this by stopping device during owner reset.

Reported-by [email protected]
Fixes 3a4d5c94e9593 ("vhost_net: a kernel-level virtio server")
---
 drivers/vhost/net.c |    1 +
 1 file changed, 1 insertion(+)
drivers/vhost/net.c +1 -0
@@ -981,6 +981,7 @@ static long vhost_net_reset_owner(struct
 	}
 	vhost_net_stop(n, &tx_sock, &rx_sock);
 	vhost_net_flush(n);
+	vhost_dev_stop(&n->dev);
 	vhost_dev_reset_owner(&n->dev, memory);
 	vhost_net_vq_reset(n);
 done:

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/vhost_net-stop-device-during-reset-owner.patch